diff --git a/basis/ui/gadgets/scrollers/scrollers-tests.factor b/basis/ui/gadgets/scrollers/scrollers-tests.factor
index d6792abd49..25977cd906 100644
--- a/basis/ui/gadgets/scrollers/scrollers-tests.factor
+++ b/basis/ui/gadgets/scrollers/scrollers-tests.factor
@@ -28,7 +28,7 @@ IN: ui.gadgets.scrollers.tests
 "v" get [
     [ { 10 20 } ] [ "v" get model>> range-value ] unit-test
 
-    [ { 10 20 } ] [ "g" get rect-loc vneg { 3 3 } v+ ] unit-test
+    [ { 10 20 } ] [ "g" get rect-loc vneg viewport-gap v+ scroller-border v+ ] unit-test
 ] with-grafted-gadget
 
 [ ] [
@@ -43,13 +43,13 @@ IN: ui.gadgets.scrollers.tests
 "s" get [
     [ { 34 34 } ] [ "s" get viewport>> rect-dim ] unit-test
 
-    [ { 106 106 } ] [ "s" get viewport>> viewport-dim ] unit-test
+    [ { 107 107 } ] [ "s" get viewport>> viewport-dim ] unit-test
 
     [ ] [ { 0 0 } "s" get scroll ] unit-test
 
     [ { 0 0 } ] [ "s" get model>> range-min-value ] unit-test
 
-    [ { 106 106 } ] [ "s" get model>> range-max-value ] unit-test
+    [ { 107 107 } ] [ "s" get model>> range-max-value ] unit-test
 
     [ ] [ { 10 20 } "s" get scroll ] unit-test
 
@@ -57,7 +57,7 @@ IN: ui.gadgets.scrollers.tests
 
     [ { 10 20 } ] [ "s" get viewport>> model>> range-value ] unit-test
 
-    [ { 10 20 } ] [ "g" get rect-loc vneg { 3 3 } v+ ] unit-test
+    [ { 10 20 } ] [ "g" get rect-loc vneg viewport-gap v+ scroller-border v+ ] unit-test
 ] with-grafted-gadget
 
 <gadget> { 600 400 } >>dim "g1" set
@@ -102,7 +102,7 @@ dup layout
     swap dup quot>> call
     dup layout
     model>> dependencies>> [ range-max value>> ] map
-    viewport-gap 2 v*n =
+    viewport-padding =
 ] unit-test
 
 \ <scroller> must-infer
diff --git a/basis/validators/validators-docs.factor b/basis/validators/validators-docs.factor
index 67c9f4fceb..8f5a587569 100644
--- a/basis/validators/validators-docs.factor
+++ b/basis/validators/validators-docs.factor
@@ -3,7 +3,7 @@ strings math regexp regexp.backend ;
 IN: validators
 
 HELP: v-checkbox
-{ $values { "str" string } }
+{ $values { "str" string } {  "?" "a boolean" } }
 { $description "Converts the string value of a checkbox component (either \"on\" or \"off\") to a boolean value." } ;
 
 HELP: v-captcha
diff --git a/basis/validators/validators.factor b/basis/validators/validators.factor
index 04c85cd6db..e49f608e94 100644
--- a/basis/validators/validators.factor
+++ b/basis/validators/validators.factor
@@ -2,11 +2,11 @@
 ! See http://factorcode.org/license.txt for BSD license.
 USING: kernel continuations sequences math namespaces make sets
 math.parser math.ranges assocs regexp unicode.categories arrays
-hashtables words classes quotations xmode.catalog ;
+hashtables words classes quotations xmode.catalog unicode.case ;
 IN: validators
 
 : v-checkbox ( str -- ? )
-    "on" = ;
+    >lower "on" = ;
 
 : v-default ( str def -- str/def )
     over empty? spin ? ;
diff --git a/extra/serial/windows/tags.txt b/extra/serial/windows/tags.txt
new file mode 100644
index 0000000000..6bf68304bb
--- /dev/null
+++ b/extra/serial/windows/tags.txt
@@ -0,0 +1 @@
+unportable